Fabrice Moggia

Synthesis and thin film electronic properties of two pyrene-substituted oligothiophene derivatives

The synthesis and the electric properties of two new pyrene end-substituted oligothiophene derivatives (Py-nT, n = 2,4) are described. The highest hole mobility (ca. 10−3 cm2 V−1 s−1) was obtained for vacuum evaporated thin films of Py-4T as the active layer in field effect transistors based on hexamethyldisilazane-treated SiO2/Si substrates. Moreover, Py-nT thin films were doped with molecular iodine, which led to a 106 fold increase of electric conductivity. In the case of Py-4T, a value of 1 S cm−1 was obtained after 21 minutes exposure to iodine vapor.

Internally referenced analysis of charge-transfer reactions in a new ferrocenyl bithiophenic conducting polymer through cyclic voltammetry

A new ferrocenyl bithiophenic polymer has enabled the first demonstration of internally referenced quantitative analysis of charge-transfer reactions, which may enable better understanding and applications of conducting polymers in e.g. supercapacitors.

Conducting and semiconducting end-capped oligothiophenes for thin films devices in organic electronics

Critical to the development of organic electronics is the design and synthesis of new organic semiconductors with improved electrical performances and enhanced environmental stability. We present in this communication a series of simple oligothiophene derivatives that bear the styryl (DS-nT) or pyrene (Py-nT) unit as terminal substituents. Thin-film field-effect transistors incorporating DS-nT show high electrical performance, such as mobilities as high as 0.1 cm2/Vs, along with exceptional stability under ambient conditions. Especially, the longer oligomer DS-4T containing the quaterthiophene core gives rise to devices that show no decrease in performance after more than 17 months of storage and under continuous operation. Such stability features are unprecedented in the oligothiophene series. Py-nT thin films were doped with molecular iodine, which led to a 106 fold increase of electric conductivity. In the case of Py-4T, a value of 1 S cm¿1 was obtained after 21 minutes exposure to iodine vapor.